“The cybersecurity of the committee’s data is paramount, and upon learning of the intrusion, the NRCC immediately launched an internal investigation and notified the FBI, which is now investigating the matter," NRCC spokesman Ian Prior said. "To protect the integrity of that investigation, the NRCC will offer no further comment on the incident."

According to Politico, the hackers surveilled the emails of four senior aidesfor months before a vendor noticed the intrusion and alerted the NRCC and its cybersecurity contractor.